172874945 has 8 divisors (see below), whose sum is σ = 214603560. Its totient is φ = 133530880.

The previous prime is 172874929. The next prime is 172874953. The reversal of 172874945 is 549478271.

172874945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5041 + 172869904 = 71^2 + 13148^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172874945 - 2⁴ = 172874929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172874945.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595976 + ... + 596265.

It is an arithmetic number, because the mean of its divisors is an integer number (26825445).

Almost surely, 2^172874945 is an apocalyptic number.

It is an amenable number.

172874945 is a deficient number, since it is larger than the sum of its proper divisors (41728615).

172874945 is a wasteful number, since it uses less digits than its factorization.

172874945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192275.

The product of its digits is 564480, while the sum is 47.

The square root of 172874945 is about 13148.1917007625. The cubic root of 172874945 is about 557.0711724402.

The spelling of 172874945 in words is "one hundred seventy-two million, eight hundred seventy-four thousand, nine hundred forty-five".